Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff8e21596499410…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 17:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8bec9c05a655ad8b58c8957940d3eb0 SHA-1: b84cc5291c0c60c9ec9f2fa522e563a48e5915b1 SHA-256: 6ff8e215964994103dcc8ec619951a758fa1e2c581db7171dc93f42bd395be41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive link presented as trivia questions, which redirects to a known malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this redirection to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates the PDF is part of a larger scheme to generate traffic through numerous links, many of which point to benign Shopify URLs but likely serve as a cover for the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=fun+bible+trivia+questions+and+answers
    • http://sogijito.anptech.net/uploads/1/3/1/8/131857920/ba573a47959.pdf
    • http://files.rossflemingdesign.com/uploads/1/3/2/7/132740193/2820fc0af29.pdf
    • http://files.wildlittlemonkeys.com/uploads/1/3/2/6/132682113/3876978.pdf
    • http://files.rydeupholstery.com/uploads/1/3/2/8/132816096/vevasabarubope.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5045/8526/files/careers360_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/adobe_pack_subs_adobe_systems_san_jose_ca.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/prelude_in_d_minor_bwv_999.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/medical_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/44654473609.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7193/files/facial_nerve_palsy_physiotherapy_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0464/7646/0182/files/tapesunetobokupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/25511973619.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/sample_expense_report_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/pufasezakamira.pdf
    • https://cdn.shopify.com/s/files/1/0436/8406/9529/files/full_block_format_business_letter_example.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640b.bin
18ef57b8f40e8981587d72df3a598eb794b48a23c7253c5980673d70b2a4e37d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5192 bytes
font_01_sfnt_off000075c7.bin
b6ee32171587791b0e5cc2b70291fc0fbb5cf4f212b624e5c705b597213f26cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 11412 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.